Victory for Guillaume and Husqvarna at WEC GP

CH Racing Husqvarna's Seb Guillaume has claimed is sixth double Enduro 3 class podium result of the '07 World Enduro Championship season, this time at the eighth and final round of this years WEC series staged in Noirtable, France.

Topping the competitive E3 class on day one to claim his first day win of the season Seb then went on to finish as runner-up to newly crowned E3 world champion Ivan Cervantes on day two to bring his '07 WEC campaign to an impressive close. A mixture of clear skies, warm temperatures, a demanding rock littered course and three challenging special tests resulted in the GP of France being one of the most physically demanding world championship races this year.

For Seb it was his best event of the championship as he finally managed to beat Spain's Ivan Cervantes and stand on top of the E3 class podium.

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Honda CBR-150 modify

One question I get often is can I get more out my Honda CBR150. First the Honda CBR-150 is a nice looking machine, with sporty road bike racing features.

It is said that Casey Stoner, Australian MotoGP rider started out on a Honda CBR150. What is the Honda CBR150 technical; the CBR150 comes with a 4 stroke, DOHC 4 Valves, water-cooled 149.4cc engine. The cylinder bore is 63.5mm and the stroke is 47.2mm (We can several other smaller cc motorcycle from Honda with the same bore), the compression ration is 11:1 and the ignition is by CDI Direct.

The standard spark plug is an NGK CR8E, but seen also CBR150's with a Denso U24ESR-N.

The transmission of Honda CBR150 comes with a 6 gear transmission, with a gear ratio from 3.038 for the first gear and a ratio of 0.923 for the last (6th) gear. Honda is using a wet, multiple disk clutch type for this motorcycle.

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Carburetor Tuning, Tuning the Main Jet Circuit

With the introduction of the new Yamaha motorcycle 2008 model line, it looks that the end of the good old carburetor is in sight. The carburetor as we know it today was invented by a Hungarian engineer back in 1892.

But enough about the sentimental part, and back to our task: tuning the main jet circuit of a regular carburetor.

Tuning or adjusting the main jet circuit is where the most confusion seems to be. The main jet really doesn't come into full play until the last quarter turn of the throttle. When the needle rises in the tube far enough that gap is equal to or greater than the size of the main jet, the main jet becomes the metering device for fuel flow.

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Yamaha X-City 125 - A modern classic

With the Yamaha X-City 125, Yamaha clearly follows the retro style for the 2008 product line, calling this model a modern classic, this new Yamaha 2008 model, which is for now is only available in Europe is a 125cc fuel-injected 4-stroke engine, and V-Belt automatic transmission system.

To Yamaha specifications the engine maximum power output is 10.76 kW @ 8,750 rpm with a torque of 11.70 Nm @ 8,750 rpm, make sure you hold tide if going for quick getaway. For comparison the Harley Davidson 2003 Fat Boy model 1450cc has a maximum power output of 46 kW, so the 125cc Yamaha is surely good on performance

The Yamaha X-City 125 has powerful hydraulic disc brakes both front and rear, and the extra cool looking 16 inch front/15 inch rear rimes/tyres for stable and smooth ride.

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That was the 7th international KTM Festival

The 7th International KTM Festival wrapped up three days intense riding fun when more than 850 riders packed up their beloved machines and broke camp to conclude the biggest and most successful Orange Family event in the company's history.

Thank you Hungary! Thank you Hungaroring! A great host country and a great cooperation with the staff of one of the world's premier international racing circuits. Around 1200 participants leave the KTM Festival, taking with them great memories of a packed program of events and three days of continual riding fun. KTM enthusiasts tested themselves on everything from the challenging curves of the Formula One circuit to the tricky Enduro track, from the challenging jumps of the Motocross course to the asphalt surfing on the Supermoto track.

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Carburetor Tuning, adjusting the idle mixture

The first step in tuning the pilot circuit is, or any, carburetor is to get the idle circuit correctly adjusted. That means adjusting the idle mixture screw for the best idle. Keihin carburetors sets the idle mixture screw during assembly and seals the screw under aluminum plug to prevent an owner from changing the setting.

If the aluminum plug is removed, which can be done by carefully drilling a small hole in the plug, threading in a small screw, and then pulling out the plug, gently turn the adjusting screw all the way in until it bottoms. Then turn it two and a half turns out from the fully closed position.

Next, start the engine and bring it up to operating temperature. With the bike in the vertical position and the idle near 1000rpm, turn the idle mixture screw in slowly until the idle either slows or becomes irregular. Now turn the screw out until the engine again slows or begins an irregular idle, counting the number of turns between the too rich and too lean positions.

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Motorcycle Loading Ramp

For things with a engine, Thailand is will known for two products around the world, the first is the amount of small motorcycles the second is the quantity of pickup trucks you see, it sometimes looks like everybody has a pickup truck.

Small engine motorcycles or scooters are great for transport in the cities, but are not that comfortable doing intercity travel.

So why not load the motorcycle in the back of the pickup truck, true but even if a small motorcycle doesn't weight as much as there big brothers, they still can be an uncomfortable load to get in the back of the pickup truck.

With two motorcycles in the back, driving upcountry on a highway, which seems endless to European standards.

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Stock Clutch vs Racing Clutch

There is an important axiom of performance work that many novice engine modifiers or builders seem to overlook: Once you've made an engine a performance fire-breather, some of the bike's engine mechanical components may need to be beefed up to handle the extra power, with the clutch usually being the first weak link.

Make no mistake: the OEM/standard clutch pack does an excellent job handling stock power levels, as well as quite a bit more. It has an easy lever pull, smoothly controls the engine's power, and sends all of it to the transmission.

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Introduction of New Yamaha motorcycles and scooters

Today Yamaha Motors informs us that whatever else you maybe doing on Monday 10 September, make sure you are ready to see the first looks of the introduction of the new 'European' motorcycles and scooters models.

Why this is so important, Europe is for motorcycles and scooters designs one of the most important markets for motorcycles manufacturers, it is simple if the design is not accepted in Europe its introduction is almost useless in most territories of the world.

Yamaha who not to long ago blessed us with the O so popular remake of the '50's retro style scooter model the Vino or for Thailand the Fino. Is expected to follow this success story world wide.

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Advance Engine Modifications

There are several ways to make something out of metal. The part can be stamped, cast, forged or machined. In fact, most motorcycle parts are a combination of more than one of these operations.

The chosen methods of metal working for a given part are usually based on economy of scale. If you are going to make a lot of a given part it is usually less expensive to have a set of dies made and cast it or forge it than it would be if you where machining it from a solid chunk of metal.

On the other hand, if you are operating in custom or small lot sizes then the CNC machines make a fully machined part not only possible but also cost effective. There is another reason to fully machine a part: if you need or want to possibly make changes to it design later on.

So what does all of this theory of metal production have to do with motorcycles? It explains why some would make billet heads and cylinders for their custom highly modified motorcycle engines.

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